Brake shoe



Nov; 26, 1929. 1 E, LA '5R15 1,737,013

BRAKE SHOE Filed Feb. 14, 1927 'l llllllllllllIIl/ 1,/

F/G. 4 f6 s 3 Mic/6.3 mj f fm \6 i INVENTOR Lunef ELA BRIE M; H615 ATTORNEY patented Nov. 26, ,|1929 UNITED STATES PATENT- oFFIcE LUDGER E. LA BRIE, OF SOUTH BENIO, INDIANA, ASSIGNORTO BENDIX BRAKE COM- PANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS BRAKE sncf:

Application led February 14, 1927. Serial No. 168,044.'

This invention relates to brake shoes, and

'isillustrated as embodied in shoes for an internal expanding automobile brake.

A11 important object of the invention is to provide strong and light, but inexpensive, shoes, by building each shoe up of an arcuate outer band, for the lining, and a fiat stiife'n-.y

ing web member secured to the band by a series of spaced spot-welds. Preferably .the web member has a series of projections about its outer edge,.which. are shown as Aengaging the inner face of the outer band, so that all of the spot-welds may be made at once, by arranging oneelectrode in engagement with the outer band and forming the other to grip the-web member, so that currents are l sent simultaneously in parallel through all of the rojections.

Anot 1er feature' relates to' positioning the shoe laterally by a cam device. having parts straddling the end of the stiffening web. and engaging rollers on opposite .sides of the shoe.

The above and other objects and features of the invention will be'apparent from the following description of one illustrative embodiment shown in the accompanying drawing, in which: l

Figure 1 is a vertical section through a brake, just inside the head of the drum, showin the novel shoes in side elevation;

l(Figure 2 is a: cross-section through one of y the end shoes, on the line 2- 2 of Figure 1;

- drum 10, atthe 'openside of which is a backing plate or other support 12, and within which are arranged a prlmary shoe 14, an

auxiliary shoe 16,` and a secondary shoe 1,8.

Each of the shoes 14 and 16 includes van outer arcuate band 2O2 to which the lining 22 is riveted or otherwise secured, anda flat stiening web member 24, which extends be- 'resistance of an auxiliary return spring 50.

the positioning of y yond the lower end of band 20vas a pivot arm. Each web member 24 is notched along its outer edge to form a series of projections 26 engaging the inner face of band 20. In manufacturing the shoe, oneelectrode engages band 20, and the other electrode is formed to grip the web member 24, so that the current divides in parallel among the projections 26, whichare thus simultaneously spot-welded to the band 20.

Shoe 18 differs from the primary and auxiliary shoes principallyin that band 30, carrying the lining 32, is stiifened by two par- .allel webs 34 notched to form series of proj ections 36 spot-welded to band 30 as described above.

, The primary shoe 14 is varranged with the end of its web member 24 extending between web members 34, and connected to them by a oating pivot 38. Secondary shoe l8is,

- mounted at its opposite end on a iixed pivot or anchor 40, while auxiliary shoe 16 1s arran ed with its stiiening web member 24 exten ing between web members 34 and pivoted on an anchor 42.

The brake is applied by novel means shown as including a 'cam device 44 slotted to form parts embracing the ends of web members 24 of shoes 14 and 16 to position the shoes laterally. The cam device 44 engages pairs of rollers 46 mounted on opposite sides of the shoes. The cam 44 applies shoes 14 and 16 against the resistance' of a'return spring 48, whereupon shoe 14 applies shoe 18 against the i While one illustrative embodiment has been described in detail, it is" not my intention to limit 'the scope of the invention to that particularl embodiment, -or otherwise than by the terms of the appended claims.

I claim:

1. A brake shoe having a generally-arcuate outer band, and a flat radial stiffening `web t member having along its outer' edge a series radial projections spot-welded to the inner face of said band.

3. A brake shoe having a enerally-arcuate outer band, and a radial sti ening web member secured at its edge surface to the linner faclJ of said band by a series of spaced spot- We s.

4. A brake shoe having a curved outer band member and a stienng member enga 'ng the inner face thereof, one of said mem ers being formed with radial projections engaging the other and being Welded to the other. In testimony whereof, I have hereunto signed my name.

- LUDGER E. LA BREE. 

